Of course, everything would depend on what that resonant frequency would be as well as what resonant frequency would contribute the most. Everything would be trial and error.
Correct - I was thinking of a metal egg cup for enjoying your boiled egg.
I agree about trial and error - which is the exactly the same issue for DIY acoustic treatments ....you build some panels and then try them out and find a good position for them.
It occured to me that metal or ceramic egg cups, bowls, bells, thimbles, wine glasses, abalone shells, chimes and other similar items must necessarily behave like Acoustic Resonators so why haven't people tried them? (Note: There is extensive experimentation with DIY acoustic panel stuff from heavy curtains to shaggy rugs - so why not the same DIY solution with "acoustic resonators" ?
Please don't tell me there is a quantum dot or something super special ONLY about Frank's version - surely there are other resonating things out there that might work too?
Anyone try five crystal wine glasses strategically placed on tables around the room?